I love finding the little references and touches the folks at Bliz put into the game. They give many *squee* moments, nostalgic rummaging and fond memory visitation. Thanks be to the devs!
While it is noted on the npc's page, Jugkar Grim'rod is named after Jugger Grimrod...a character from the comic book Alien Legion from back in the 80's.
Caretaker Alen has a reference to Men at Work's Down under song. Wiki